Airway Gas Interface Switching for Continuous Oxygenation
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Solution Overview
Problem
Existing respiratory therapy systems face challenges in managing respiratory support transitions, particularly during difficult intubation procedures, which can lead to prolonged oxygen saturation declines and increased health risks, and there is a need for systems that allow easy interchange between different respiratory support methods and quick adjustment of gas flow.
Innovation Solution
A respiratory apparatus with a nasal interface and gas conduit that can transition between configurations for varying gas flow levels, using a sensing arrangement and collapsible portions or valves to adjust flow based on sensor inputs, allowing seamless switching between respiratory modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a face mask and bag are used for pre-oxygenation during difficult intubation, then oxygen saturation can be maintained, but the intubation process must be interrupted multiple times and reapplication is required, which is time consuming
Solution Approach 1:
The patent combines the pre-oxygenation function and intubation support into a single integrated nasal cannula system. The cannula delivers both oxygen flow and allows simultaneous intubation attempts without requiring interruption to reapply equipment, thus maintaining oxygen saturation while eliminating time loss from repeated applications
Solution Approach 2:
The nasal cannula is pre-positioned and configured to deliver oxygen before intubation begins. The system is prepared in advance with adjustable flow rates and configurations, allowing continuous oxygen delivery throughout the entire intubation process without interruption or reapplication
2Reliability
If multiple respiratory support systems are combined (cannula and mask), then respiratory support is enhanced, but excessive pressure delivery may occur
Solution Approach 1:
The nasal cannula incorporates a dynamic flow control mechanism that automatically adjusts oxygen delivery based on real-time pressure conditions. When a face mask is applied, the system detects the pressure change and modulates the cannula flow rate accordingly, preventing excessive pressure buildup while maintaining effective respiratory support
Solution Approach 2:
The system includes pressure sensors that continuously monitor airway pressure and provide feedback to the flow control mechanism. This closed-loop control allows the system to detect when a face mask is applied and automatically reduce or modulate cannula flow to prevent excessive pressure delivery, ensuring safe combined support
3Adaptability or versatility
If respiratory support systems are switched between different modes, then adaptability is improved, but the switching process is time consuming or difficult
Solution Approach 1:
The nasal cannula is designed as a universal interface that can operate in multiple respiratory support modes (continuous flow, demand flow, pressure support) without requiring physical replacement or complex reconfiguration. A single device provides all necessary functions through electronic control, enabling rapid mode switching without time loss
Solution Approach 2:
The system replaces mechanical switching mechanisms with electronic control and software-based mode transitions. Flow rate and delivery mode changes are achieved through electronic actuators and control algorithms rather than manual mechanical adjustments, significantly reducing switching time and simplifying the transition between respiratory support modes
4Reliability
If gas flow is quickly turned off or reduced, then patient safety is improved, but the control mechanism complexity increases
Solution Approach 1:
The nasal cannula incorporates self-regulating flow control mechanisms with automatic shut-off or reduction capabilities triggered by pressure sensors, flow detectors, or user-activated buttons. The system monitors its own operation and can independently reduce or stop flow in response to detected conditions (such as mask application or excessive pressure), providing rapid safety responses without complex external control systems
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and safe management of respiratory support, reducing the risk of oxygen saturation declines and facilitating quick transitions between different support systems, thereby improving patient safety and procedural efficiency.
Implementation Method 1
a sensing arrangement comprising a first pressure sensor located downstream of the device, and a second pressure sensor located upstream of the device, such that the first or second configuration of the conduit can be determined based on a generated signal or output from the first and second sensors
Data Source
AI summary
The invention relates to a respiratory system comprising a first patient interface for delivery of a first flow of gases to a patient, a second patient interface for delivery of a second flow of gases to the patient, and a device and/or sensing arrangement that is configure to facilitate a switching of the system between a first respiratory mode where the device allowing delivery of the first flow of gases to an outlet of the first patient interface when the second patient interface is absent from the patient, and a second respiratory mode where the device reducing or stopping delivery of the first flow of gases to the outlet of the first patient interface when the second patient interface is located together with the first patient interface upon the patient.